Exposure is the quantity of brightness pull together by the sensor in your camera throughout a single photo. If the shot is depiction too long the picture may washed out. If the shot is depiction too short the picture will come out too dark. Roughly all cameras today have light meters which quantify the light in the given shot and set an ideal exposure mechanically. The majority people depend on the light meter which is fine, but if you know how to manage your exposures you can get some artistic and maybe better quality of pictures.

The primary controls of your camera uses for exposure are shutter speed and aperture. Shutter speed control the amount of time the sensor is exposed to light. The aperture control the size of the lens opening that lets light into the camera. Shutter speeds are quantify in seconds and more frequently division of a second. Apertures are quantify in term of f/stops.

You might question why there is not just a steady shutter speed or a steady aperture so that you would only have to think about one control. The motive is that even if they both manage the quantity of light getting to the sensor they also manage other things of the image.

Majority digital SLR's cameras nowadays you can even adjust the compassion of the sensor when pull together light which is called the ISO speed. The higher the ISO speed the quicker the camera collects light but it also give more noise to the picture than the lower speeds.

The best way to learn how to use shutter speed and aperture is to just keep experimenting with them. Just keep trying and practice until you get the quality of pictures that you want.